Dudek, Andrzej, Daria E. Jaremen, Izabela Michalska-Dudek, and Pavlina Pellesova. “An Identification of the Essential External Inhibitors of the Purchase of Package Holidays and Their Impact on Future Purchasing Behaviour”. Bulletin of Geography. Socio-economic Series, no. 68 (June 30, 2025): 205–220. Accessed December 8, 2025. https://apcz.umk.pl/BGSS/article/view/57346.